1209 Dekalb Avenue in Brooklyn. (iStock, Kutnicki Bernstein Architects) Tenants in a Bushwick building scored a victory against their landlord in court this week, which could be a harbinger of headaches to come for the real estate industry. A New York State Supreme Court judge ruled that the tenants’ suit, which accuses landlord Spruce Capital Partners of rent overcharges at 1209 Dekalb Avenue, would continue. The landlord and three influential trade groups had petitioned the court to dismiss the case. It’s one of seven separate cases where tenants are seeking class action status against landlords who received 421a tax abatements and then allegedly illegally inflated rents at their properties. The complaints were filed in the past seven months after investigations by the watchdog group Housing Rights Initiative.